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In the power industry, the widespread use of SF6 relay provides an effective monitoring means for the operation and maintenance of electrical equipment. However, with the continuous development of technology, we gradually realize some existing problems, the most prominent of which is the inconvenience brought by the high installation of SF6 relay. In response to this issue, we propose the "Shift and Non-Dismantling Calibration Transformation Scheme" for SF6 relay.
In the actual operation of power equipment maintenance, the high installation of SF6 relay leads to the inconvenience of high reading. This mainly focuses on equipment such as column circuit breakers and tank circuit breakers, which, due to their structural and design limitations, often have the SF6 relay installed at a height, causing great inconvenience to daily inspections and readings. In addition, frequent dismantling during calibration also affects the reliability and maintenance efficiency of the equipment.
For outdoor column circuit breakers, we propose the retrofit scheme of porcelain column circuit breakers encapsulated with insulating ceramics. By redesigning the installation position of SF6 relay, lowering its height, the issue of inconvenience in reading is resolved. The use of corrosion-resistant stainless steel 304 square tubes as the main frame of the fixed bracket ensures that the fixed bracket is securely installed indoors or outdoors.
For indoor or outdoor tank circuit breakers, we propose the retrofit scheme of tank circuit breakers encapsulated with metal materials. By redesigning the installation position of SF6 relay, lowering its height, the issue of inconvenience in reading is resolved. The fixed bracket is made of stainless steel 304 square tubes, and the base is made of 5mm thick square steel plate to ensure firm fixation. In addition, considering the ultra-high voltage level, special consideration is given to the structure of the tank circuit breaker, providing corresponding retrofit solutions.
Frequent dismantling of SF6 relay brings many inconveniences to equipment maintenance. According to the "25 Key Requirements for Preventing Power Production Accidents" issued by the National Energy Administration, we have specially designed a non-dismantling calibration scheme to ensure that frequent dismantling during calibration is no longer required.
The fixed bracket considers the installation requirements of indoors or outdoors, using corrosion-resistant stainless steel 304 square tubes, and a base made of 5mm thick square steel plate to ensure the firmness of the fixed bracket. To ensure the firm installation of the instrument box, a 3mm thick mounting plate is specifically processed for the installation of the instrument box.
All pipelines from the original SF6 relay connector seat are made of pure copper 59-1 or 316L stainless steel, fixed and protected by KBG steel pipe. The SF6 relay and non-dismantling three-way valve adopt a rainproof cover or enclosed structure design to ensure that they are not affected by external forces and provide good protection when outdoors.
Considering the structure of different SF6 high-voltage electrical appliances, this scheme effectively solves the problems of high-level reading and calibration through clever shifting and non-dismantling design, improving the maintainability and reliability of the equipment, and providing a more convenient and efficient solution for equipment maintenance in the power industry.
